EP4347995A1 - Chemise soluble pour des complétions de puits d'hydrocarbures - Google Patents

Chemise soluble pour des complétions de puits d'hydrocarbures

Info

Publication number
EP4347995A1
EP4347995A1 EP22816950.4A EP22816950A EP4347995A1 EP 4347995 A1 EP4347995 A1 EP 4347995A1 EP 22816950 A EP22816950 A EP 22816950A EP 4347995 A1 EP4347995 A1 EP 4347995A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
liner
region
completion
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22816950.4A
Other languages
German (de)
English (en)
Inventor
James Rutherford
Roy MIDDLETON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ConocoPhillips Co
Original Assignee
ConocoPhillips Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ConocoPhillips Co filed Critical ConocoPhillips Co
Publication of EP4347995A1 publication Critical patent/EP4347995A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
    • E21B33/16—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes using plugs for isolating cement charge; Plugs therefor
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning

Definitions

  • This invention relates to the methods and apparatus for facilitating completion of oil and gas wells.
  • a liner When completing a hydrocarbon producing well (or water injection well) a liner may be cemented into the hydrocarbon producing formation.
  • the operation of cementing involves passing cement down the liner, out of the distal end of the liner and into the annular space between liner and rock formation (the annulus). Ideally, all the cement passes into the annulus and none remains in the liner. However, in practice some cement will remain on surfaces inside the liner.
  • the liner may include completion equipment, e.g. filters, sleeves, etc, some of them activated by ball- drop.
  • completion equipment e.g. filters, sleeves, etc, some of them activated by ball- drop.
  • the internal profile of the liner with this equipment may be complex and may, e.g., include perpendicular steps/ shoulders. Cement can be trapped by this complex inner profile.
  • the operation of the equipment, such as sliding sleeves, may be impaired by trapped, set cement.
  • a cleanout operation to remove residual cement before displacing with completion fluid preparatory to performing completion operations.
  • One way of cleaning the inner surface of the liner is to drop or pump a wiping/cleaning device down the liner that is designed to engage with the inner liner surface and wipe it clean as it moves along.
  • the device often takes the form of an elongate body with angled, flexible fins that resiliently engage with the interior of the liner. This kind of device is commonly known as a wiper dart, and for these purposes the term “wiper dart” will be used to describe any device designed to engage with the inner liner surface and wipe it clean.
  • the wiper dart Whilst the wiper dart is effective at cleaning a uniform liner surface, it may leave deposits of cement and other debris in parts of the completion equipment due to the complex profile of such equipment.
  • the profile of the completion equipment normally includes recesses or cavities which are very prone to these deposits.
  • a sharp or perpendicular step in the profile, facing either distally or proximally, can create a region which is inaccessible to the wiper dart and therefore trap residual cement or other solid debris.
  • This cement/debris can be a source of contamination of the formation and can plug completion apertures in the liner. Even more importantly, the deposits may impair or prevent functioning of the completion equipment.
  • Sliding sleeves are a common component of completion equipment and are especially vulnerable to this problem since they tend to have profiles which include perpendicular steps and because cement/debris deposits can prevent axial sliding movement of the sleeve. As completion techniques advance and downhole equipment becomes ever more complex, this issue is becoming more and more important.
  • a protective sleeve made of a material which can be dissolved away by a chemical which may be passed through the liner.
  • acid stimulation fluid e.g. 28% hydrochloric acid
  • a protective sleeve of, e.g., aluminium e.g., aluminium.
  • the outer profile of the sleeve could be formed to fit closely with the profile of the completion equipment, thereby keeping the sleeve in place and providing additional protection against cement/debris entering any of the recesses/cavities in the equipment profile.
  • the inner surface of the sleeve may have profiled proximal and distal (entry and exit, upper and lower) inner surfaces to create a smooth transition between the uniform inner liner surface on each side of the region with completion equipment (or other non-uniform inner profile). Otherwise the bore of the protective sleeve would have a uniform circular cross section. In this way, a wiper dart will only need to negotiate a smooth, gradual change in the diameter of the liner bore with no substantial steps or other irregularities. Wiper darts, especially those with flexible fins, are generally able to negotiate such changes in bore diameter well, and to provide effective cleaning of both diameters and the transition sections.
  • dissolvable components for downhole use are well known, e.g. balls and frac plugs or gaseous frac plugs.
  • Other commonly used dissolvable materials include, e.g., thermoplastics and magnesium alloys and these could be used for the dissolvable sleeve of the invention.
  • Alternative materials for the sleeve include composites or resin materials. If such materials were used, the sleeve could be milled out rather than being dissolved away. Other materials may be also be suitable for milling away.
  • US2019040695A1 describes a dissolvable sleeve to protect a nipple profile in completion operations.
  • the purpose of the sleeve is not to facilitate cleaning but rather to protect the nipple profile from inadvertent damage.
  • the sleeve described and shown in US2019040695A1 may in fact cause problems with cleaning, since it creates an inner profile with sharp steps at each end.
  • the invention more particularly includes a process for cleaning a liner or casing prior to completion, wherein the liner or casing has a region with a non-uniform inner profile, the process comprising: a) installing a protective sleeve (also known as an insert) in the liner extending over the said region, the protective sleeve or insert having a through bore with a substantially circular section; b) passing a wiper dart or other cleaning device through the said region; c) removing the sleeve; and d) performing the completion.
  • a protective sleeve also known as an insert
  • the sleeve or insert has no abrupt changes in diameter or shoulders.
  • the non-uniform region comprises, for example, completion equipment having a non-uniform inner profile.
  • the sleeve or insert may have an outer profile complementary to the non- uniform inner profile of the completion equipment.
  • the bore of the sleeve may have tapered distal and/or proximal regions, to provide a smooth transition between the uniform liner/casing bore distally and proximally of the non-uniform region.
  • the step of removing the sleeve may comprise dissolving the sleeve by means of a fluid, e.g. acid, passed through the sleeve.
  • a fluid e.g. acid
  • it may comprise milling away the sleeve using a milling tool.
  • the invention comprises a sleeve or insert having a through bore with a substantially circular cross section with no abrupt changes in diameter and an outer surface profiled in a complementary manner to a non-uniform inner profile of a region of liner or casing, the sleeve being made from a material which is dissolvable by means of a fluid or is millable by a downhole milling tool.
  • the bore of the sleeve/insert may have tapered distal and/or proximal regions.
  • the insert or sleeve may be made from aluminium or another material dissolvable by acid.
  • the invention comprises an assembly comprising a liner or casing having a region with an non-uniform inner profile and a sleeve or insert as described in any of the paragraphs above fitted to the region, whereby a bore through the assembly is provided having a circular cross section with no abrupt changes in diameter or shoulders.
  • the said region may comprise completion equipment having a non-uniform inner profile.
  • the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
  • a process, product, article, or apparatus that comprises a list of elements is not necessarily limited only those elements but can include other elements not expressly listed or inherent to such process, process, article, or apparatus.
  • “or” refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
  • substantially is defined to be essentially conforming to the particular dimension, shape or other word that substantially modifies, such that the component need not be exact.
  • substantially cylindrical means that the object resembles a cylinder, but can have one or more deviations from a true cylinder.
  • An abrupt change in diameter is defined as a diameter change wherein the axial distance over which the total change in diameter occurs is less than 50% (0 to 50%) of the diameter change, optionally less than 30% (0 to 30%), such as less than 10% (0 to 10%).
  • a shoulder means a transverse surface bridging two inner cylindrical surfaces of different diameters where the angle of the transverse surface is e.g. between 60 and 90 degrees to the axis, optionally between 80 and 90 degrees to the axis.
  • the shoulder (transverse surface) may be curved, in which case the angles are calculated based in a notional plane of greatest possible angle to the axis, drawn between the two diameters.
  • any examples or illustrations given herein are not to be regarded in any way as restrictions on, limits to, or express definitions of, any term or terms with which they are utilized. Instead, these examples or illustrations are to be regarded as being described with respect to one particular example and as illustrative only. Those of ordinary skill in the art will appreciate that any term or terms with which these examples or illustrations are utilized encompass other examples as well as implementations and adaptations thereof which can or cannot be given therewith or elsewhere in the specification and all such examples are intended to be included within the scope of that term or terms. Language designating such non-limiting examples and illustrations includes, but is not limited to: “for example,” “for instance,” “e.g.,” “In some examples,” and the like.
  • first, second, etc. can be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present inventive concept.
  • Figure 1 is a highly schematic section through a portion of liner incorporating completion equipment, showing a known type of wiper dart passing through;
  • Figure 2 is a view similar to Figure 1 showing a protective sleeve according to the invention in place.
  • Figure 1 represents the prior art. A schematic section through a portion of a completion liner 1 is shown.
  • the liner 1 is installed in a wellbore (not shown) intended for hydrocarbon production or for water injection to facilitate hydrocarbon production.
  • the liner 1 is fitted with completion equipment, e.g. sliding sleeves, valves, etc., all of which is conventional and would be familiar to one skilled in this field.
  • the liner 1, with completion equipment has an irregular internal profile 2.
  • a liner is shown and described, the embodiment shown in the Figures could alternatively represent a casing.
  • the liner 1 has just had cement displaced through it in order to fill the annular space between it and the wellbore, thereby cementing the liner in place prior to completion. This process will have left residual cement in the liner 1, especially in parts of the irregular inner profile 2. Residual cement is shown in Figure 1 by reference numerals 5.
  • a wiper dart comprising a number of elastomeric fins 3 is shown being passed through the liner on drill string 4.
  • the dart is passed down the liner 1 from left to right in Figure 1, which is from the more proximal end of the liner (with respect to the surface) to the more distal end (i.e. the end nearer the bottom end of the wellbore). Whilst the wiper dart is effective at removing cement from the relatively uniform parts of the liner inner profile, numbered 10 on the left and right of Figure 1, cement is often not effectively removed by the wiper from the irregular profile, leaving pockets 5 of residual cement.
  • the elastomeric fins 3 are designed to deform to adapt to different inner diameters of the liner but the ability of the fins to conform completely to the inner profile 3 is limited. Where there is a sharp shoulder in the inner profile, e.g. as shown at reference 6, it may be impossible for the wiper dart fins to access it. This is especially true for a shoulder with a distally-directed surface as shown in Figure 1 at reference 7. [0035] If pockets 5 of cement remain, the cement may set and can obstruct the functioning of the completion components, e.g. sliding sleeves, installed in the liner 1. The cement can also become loosened over time and contaminate fluids in the well.
  • the completion components e.g. sliding sleeves
  • Figure 2 shows a similar section of liner 1 with completion equipment making an irregular inner profile 2.
  • An insert 8 is fitted to the liner and completion equipment prior to running the liner into the well bore.
  • the insert 8 may be included with the completion equipment at the manufacturing stage.
  • the insert fits snugly to the inner profile 2 of the liner and completion equipment.
  • the inner surface 9 of the insert 7 is slightly proud of the regular parts 10 of the liner inner surface on each side of the irregular surface 2.
  • the insert 9 has profiled proximal and distal (entry and exit) inner surfaces 11 to create a smooth transition between the uniform inner liner surface 10 on each side of the irregular surface 2.
  • the inner surface 9 of the insert is flush with the unform portions 10 of inner liner surface.
  • the insert/sleeve needs to be removed.
  • the insert is made from aluminium metal in contrast to the remainder of the liner and completion equipment which is of steel. Aluminium is considerably more reactive than steel and can be dissolved away using standard 28% hydrochloric acid such as is commonly used in completions in carbonate reservoirs. Once acid has been passed down the liner, the completion equipment including sliding sleeves, etc is freed up and a standard completion operation can be carried out.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Powder Metallurgy (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne l'utilisation d'une chemise (9) installée dans un cuvelage ou un tubage (1) avant une opération de cimentation. Un équipement de complétion dans le cuvelage/tubage crée un profil interne irrégulier qui peut amener le ciment à être piégé. Un balai-nettoyeur (3) introduit et descendu dans le cuvelage/tubage (1) peut avoir des difficultés à enlever tout le ciment résiduel (5). L'utilisation d'une chemise ou d'un insert (8) dans le cuvelage/tubage (1) permet de créer un profil interne lisse (9) qui peut être nettoyé relativement facilement par un balai-nettoyeur. Une fois la cimentation et le nettoyage terminés, la chemise (9) peut être éliminée par acide si celle-ci est constituée d'un matériau soluble tel que l'aluminium.
EP22816950.4A 2021-06-03 2022-06-03 Chemise soluble pour des complétions de puits d'hydrocarbures Pending EP4347995A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163196545P 2021-06-03 2021-06-03
PCT/US2022/032195 WO2022256675A1 (fr) 2021-06-03 2022-06-03 Chemise soluble pour des complétions de puits d'hydrocarbures

Publications (1)

Publication Number Publication Date
EP4347995A1 true EP4347995A1 (fr) 2024-04-10

Family

ID=84286009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22816950.4A Pending EP4347995A1 (fr) 2021-06-03 2022-06-03 Chemise soluble pour des complétions de puits d'hydrocarbures

Country Status (5)

Country Link
US (1) US20220389301A1 (fr)
EP (1) EP4347995A1 (fr)
AU (1) AU2022287032A1 (fr)
CA (1) CA3221113A1 (fr)
WO (1) WO2022256675A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4505017A (en) * 1982-12-15 1985-03-19 Combustion Engineering, Inc. Method of installing a tube sleeve
US4673039A (en) * 1986-01-24 1987-06-16 Mohaupt Henry H Well completion technique
CA2515044C (fr) * 2003-02-04 2009-09-01 Baker Hughes Incorporated Glissiere pour systeme de liner deployable
US8720559B2 (en) * 2010-12-01 2014-05-13 Baker Hughes Incorporated Cementing method and apparatus for use with running string having an obstruction
CA3005310A1 (fr) * 2015-12-31 2017-07-06 Daniel Lee SCHMIDT Outil de fond de trou dote d'un element de structure modifiable
GB2567771B (en) * 2016-10-11 2021-10-13 Halliburton Energy Services Inc Dissolvable protector sleeve
WO2018227056A1 (fr) * 2017-06-09 2018-12-13 Gryphon Oilfield Solutions Llc Joint annulaire métallique et système sélectif de profil amélioré pour outils de fond de trou
WO2019035893A1 (fr) * 2017-08-16 2019-02-21 Blackjack Production Tools, Llc Ensemble séparateur de gaz avec matériau dégradable
US10844692B1 (en) * 2019-03-01 2020-11-24 Tim Griffin Subsurface wellbore wiper deployment system and method of use
US11566486B2 (en) * 2019-10-28 2023-01-31 Frac Master Fz-Llc Transforming bridge-to-flow-through frac plug
AU2021308217A1 (en) * 2020-07-15 2023-02-23 Conocophillips Company Well collapse reconnect system
US11913304B2 (en) * 2021-05-19 2024-02-27 Vertice Oil Tools, Inc. Methods and systems associated with converting landing collar to hybrid landing collar and toe sleeve

Also Published As

Publication number Publication date
US20220389301A1 (en) 2022-12-08
WO2022256675A1 (fr) 2022-12-08
AU2022287032A1 (en) 2023-12-21
CA3221113A1 (fr) 2022-12-08

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